title: First use of high-frequency intensity modulation of narrow-linewidth laser light and its application in determination of 206,205,204Fr ground-state properties.
abstract: Collinear laser spectroscopy was performed on the nuclear ground states of the neutron-deficient isotopes (206,205,204)Fr. A new technique was developed to suppress hyperfine pumping in collinear laser spectroscopy of atoms. This involved high-frequency intensity modulation of narrow-linewidth laser light using fast-switching electro-optical modulators. The nuclear ground-state spins of (206,205,204)Fr were determined to be 3, 9/2, and 3, respectively. Both the changes in mean-squared charge radii and nuclear magnetic dipole moments indicate a departure from single-particle estimates.
authors.affiliation: TRIUMF, Vancouver, British Columbia V6T 2A3, Canada.
authors.forename: Annika
authors.initials: A
authors.lastname: Voss
authors.forename: Matthew R
authors.initials: MR
authors.lastname: Pearson
authors.forename: Jonathan
authors.initials: J
authors.lastname: Billowes
authors.forename: Fritz
authors.initials: F
authors.lastname: Buchinger
authors.forename: Bradley
authors.initials: B
authors.lastname: Cheal
authors.forename: John E
authors.initials: JE
authors.lastname: Crawford
authors.forename: Anna A
authors.initials: AA
authors.lastname: Kwiatkowski
authors.forename: C D Philip
authors.initials: CD
authors.lastname: Levy
authors.forename: Olivier
authors.initials: O
authors.lastname: Shelbaya